Laminated body, melt-kneaded product, and method for obtaining melt-kneaded product

Abstract

A laminated body whereby it is possible to obtain a recycled material that, after recycling, is relatively favorable in terms of tensile fracture strength, tensile fracture elongation, and heat-sealing peel strength; a melt-kneaded product obtained by melt-kneading the laminated body; and a method for obtaining the melt-kneaded product are provided. The laminated body is formed by laminating a substrate layer, an adhesive layer, and a sealant layer in this order. The elastic modulus of the adhesive layer is 10,000 Pa at a temperature of 60° C. or higher and 200° C. or less. The substrate layer includes polyethylene having a density of 936 kg/m3 or higher and 980 kg/m3 or less, and is subjected to orientation processing. The sealant layer includes polyethylene having a density of 880 kg/m3 or higher and less than 910 kg/m3.

1 . A laminated body comprising a substrate layer, an adhesive layer, and a sealant layer laminated in this order, wherein
 the adhesive layer has a temperature at which the elastic modulus of the adhesive layer becomes 10,000 Pa is 60° C. or higher and 200° C. or lower,   the substrate layer comprises polyethylene having a density of 936 kg/m 3  or higher and 980 kg/m 3  or less, and is subjected to orientation processing, and   the sealant layer comprises polyethylene having a density of 880 kg/m 3  or higher and less than 910 kg/m 3 .   
     
     
         2 . The laminated body according to  claim 1 , wherein the adhesive layer is any one of an epoxy-based adhesive layer, an acrylic adhesive layer, a urethane-based adhesive layer, or a silicone-based adhesive layer. 
     
     
         3 . The laminated body according to  claim 1 , wherein the sealant layer has a thickness of 10 μm or more and 200 μm or less. 
     
     
         4 . The laminated body according to  claim 1 , wherein the sealant layer comprises polyethylene having a melt flow rate of 0.01 g/10 min or more and less than 5 g/10 min as measured at a temperature of 190° C. under a load of 2.16 kg. 
     
     
         5 . A melt-kneaded product obtained by melt-kneading the laminated body according to  claim 1 . 
     
     
         6 . A method for obtaining a melt-kneaded product by melt-kneading the laminated body according to  claim 1 .